Im happy with what it is. The gantry is 60" of 80160 extrusion, 20mm rails, a 25mm ballscrew, 1.5kw spindle, 3/4" gantry plates and Z axis. It took 2 people to get it up on the table to mount. "heavy" is all subjective here anyways.
475ozin. 3.5mH. torque hits 1.0x at 900rpm or so then goes slowly down from there. Im supplying 48V. The ballscrew is good till 1550rpm before whip is a concern.